The latest Essential Information Group (EiG) report showed the UK auction market softened in June 2025 compared to June 2024.
Lots offered dropped by 1.6% to 2,962, and lots sold went down by 6.3% to 1,993.
The success rate fell from 70.7% to 67.3% and the total raised was down 9.0% year-on-year at £389.2m.
Residential supply stayed steady, up 0.4%, but sales volumes were down 4.1%.
Commercial sales saw more of a drop, with lots sold down 21.8% and the total raised falling by 41.3%.
The East Midlands, North West, Home Counties and Wales saw good growth in activity and capital raised.
London and the South East recorded declines, especially in the commercial sector.
Scotland and Northern Ireland saw strong results in some areas, but weaker conversion rates in others.
Yorkshire and The Humber had a strong quarter commercially, though residential sales pulled the overall result down.
Stuart Collar-Brown, president at NAVA Propertymark, said: “These latest results suggest that buyers are adapting their behaviour to the latest developments in the property market overall, with the auction market softening slightly.
“However, strong growth can be seen on a regional level, especially in the East Midlands, North-West, and Wales, while Yorkshire and The Humber produced a strong quarter result in the commercial sector.
“Propertymark members reported that they believed 2025 would present a tougher market due to Stamp Duty changes, and this report could be an indicator of these predictions starting to have an impact.”
Collar-Brown added: “As buyers continue to adapt to the latest tax changes, hopefully, results produced later in the year will demonstrate more positive developments.”
